#ifndef _LINUX_LIST_H
#define _LINUX_LIST_H

#define LIST_POISON1 ((void *) 0x00100100)
#define LIST_POISON2 ((void *) 0x00200200)

#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#define container_of(ptr, type, member) ({\
           const typeof( ((type *)0)->member ) *__mptr = (ptr);\
           (type *)( (char *)__mptr - offsetof(type,member) );})

struct list_head {
        struct list_head *next, *prev;
};

#define LIST_HEAD_INIT(name) { &(name), &(name) }

#define LIST_HEAD(name) \
        struct list_head name = LIST_HEAD_INIT(name)

static inline void INIT_LIST_HEAD(struct list_head *list)
{
        list->next = list;
        list->prev = list;
}


static inline void __list_add(struct list_head *new,
                              struct list_head *prev,
                              struct list_head *next)
{
        next->prev = new;
        new->next = next;
        new->prev = prev;
        prev->next = new;
}


static inline void list_add(struct list_head *new, struct list_head *head)
{
        __list_add(new, head, head->next);
}

static inline void list_add_tail(struct list_head *new, struct list_head *head)
{
        __list_add(new, head->prev, head);
}

static inline void __list_del(struct list_head * prev, struct list_head * next)
{
        next->prev = prev;
        prev->next = next;
}

static inline void list_del(struct list_head *entry)
{
        __list_del(entry->prev, entry->next);
        entry->next = LIST_POISON1;
        entry->prev = LIST_POISON2;
}

static inline void list_replace(struct list_head *old,
                                struct list_head *new)
{
        new->next = old->next;
        new->next->prev = new;
        new->prev = old->prev;
        new->prev->next = new;
}

static inline void list_replace_init(struct list_head *old,
                                        struct list_head *new)
{
        list_replace(old, new);
        INIT_LIST_HEAD(old);
}

static inline void list_del_init(struct list_head *entry)
{
        __list_del(entry->prev, entry->next);
        INIT_LIST_HEAD(entry);
}

static inline void list_move(struct list_head *list, struct list_head *head)
{
        __list_del(list->prev, list->next);
        list_add(list, head);
}

static inline void list_move_tail(struct list_head *list,
                                  struct list_head *head)
{
        __list_del(list->prev, list->next);
        list_add_tail(list, head);
}

static inline int list_is_last(const struct list_head *list,
                                const struct list_head *head)
{
        return list->next == head;
}

static inline int list_empty(const struct list_head *head)
{
        return head->next == head;
}

static inline int list_empty_careful(const struct list_head *head)
{
        struct list_head *next = head->next;
        return (next == head) && (next == head->prev);
}

static inline void __list_splice(struct list_head *list,
                                 struct list_head *head)
{
        struct list_head *first = list->next;
        struct list_head *last = list->prev;
        struct list_head *at = head->next;

        first->prev = head;
        head->next = first;

        last->next = at;
        at->prev = last;
}

static inline void list_splice(struct list_head *list, struct list_head *head)
{
        if (!list_empty(list))
                __list_splice(list, head);
}

static inline void list_splice_init(struct list_head *list,
                                    struct list_head *head)
{
        if (!list_empty(list)) {
                __list_splice(list, head);
                INIT_LIST_HEAD(list);
        }
}

#define list_entry(ptr, type, member) \
        container_of(ptr, type, member)

#define list_for_each(pos, head) \
        for (pos = (head)->next;pos != (head); \
                pos = pos->next)

#define __list_for_each(pos, head) \
        for (pos = (head)->next; pos != (head); pos = pos->next)

#define list_for_each_prev(pos, head) \
        for (pos = (head)->prev; pos != (head); \
                pos = pos->prev)

#define list_for_each_safe(pos, n, head) \
        for (pos = (head)->next, n = pos->next; pos != (head); \
                pos = n, n = pos->next)

#define list_for_each_entry(pos, head, member) \
        for (pos = list_entry((head)->next, typeof(*pos), member); \
             &pos->member != (head); \
             pos = list_entry(pos->member.next, typeof(*pos), member))

#define list_for_each_entry_reverse(pos, head, member) \
        for (pos = list_entry((head)->prev, typeof(*pos), member); \
             &pos->member != (head); \
             pos = list_entry(pos->member.prev, typeof(*pos), member))

#define list_prepare_entry(pos, head, member) \
        ((pos) ? : list_entry(head, typeof(*pos), member))


#define list_for_each_entry_continue(pos, head, member) \
        for (pos = list_entry(pos->member.next, typeof(*pos), member); \
             prefetch(pos->member.next), &pos->member != (head); \
             pos = list_entry(pos->member.next, typeof(*pos), member))

#define list_for_each_entry_from(pos, head, member) \
        for (; prefetch(pos->member.next), &pos->member != (head); \
             pos = list_entry(pos->member.next, typeof(*pos), member))


#define list_for_each_entry_safe(pos, n, head, member) \
        for (pos = list_entry((head)->next, typeof(*pos), member), \
                n = list_entry(pos->member.next, typeof(*pos), member); \
             &pos->member != (head); \
             pos = n, n = list_entry(n->member.next, typeof(*n), member))


#define list_for_each_entry_safe_continue(pos, n, head, member) \
        for (pos = list_entry(pos->member.next, typeof(*pos), member), \
                n = list_entry(pos->member.next, typeof(*pos), member); \
             &pos->member != (head); \
             pos = n, n = list_entry(n->member.next, typeof(*n), member))

#define list_for_each_entry_safe_from(pos, n, head, member) \
        for (n = list_entry(pos->member.next, typeof(*pos), member); \
             &pos->member != (head); \
             pos = n, n = list_entry(n->member.next, typeof(*n), member))

#define list_for_each_entry_safe_reverse(pos, n, head, member) \
        for (pos = list_entry((head)->prev, typeof(*pos), member), \
                n = list_entry(pos->member.prev, typeof(*pos), member); \
             &pos->member != (head); \
             pos = n, n = list_entry(n->member.prev, typeof(*n), member))

#endif

